Muffler with side branch chambers



Nov. 18, 1952 G. H. HEDRICK MUFFLER WTH SIDE BRANCH CHAMBERS F'iled June 14 1948 3 tube Within the casing for the passage of exhaust gases through the n1uier the perforaf...ions of said tube consisting of 10ngitudinauy extending, cir culnferentially Spaced series, each Series facing a dialrletrica1ly opposite in1perforated portion of the tube, and an elongated passageway about the tube said passageway being unrestricted, 9 lurality of spaced restrictors disposed in 9 ortion of said tube within said e10ngated passageway for diverting a portion of the gases into said passageway through Said perforations, said restrictors having o engs the diaTneter of Which are less than tvv0-thirds of the dianleter of said tube, a closed chaInber in the casing, of less length than said passageway and at one end of the casing, Said chan1ber enclosing a portion of the tube, the perforate portion of the tube outside of said 4 chan1ber and within Said casing being of greater 1engh in the longitudina1 direction than said chanlber, Said chamber being 10cated on the out- 1et Side of the mumer GALE H' HEDRICK' EEFEENCES CITED The fonowing references are of record in the 10 ile of this patent:

UNITED STATES PATENTS Number N ane Date 1 87,326 }viason Aug. 30 1932 15 1910,672 Bourne May 23, 1933 2,07,2 Starkweather July 14 1936 2 2 393 IaaS June 3, 191 

